Stratobaffle

Stratobaffle is an open baffle full-range speaker designed for music lovers looking for unusual audio designs and electric guitar fans eager to have another item related to their guitar world. The speaker has the shape of the famous Fender Stratocaster guitar, which turns 60 this year.
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Here comes the Stratobaffle - an open baffle full-range speaker. Right on 60th anniversary of the famous Fender Stratocaster guitar.

Here comes the Stratobaffle - an open baffle full-range speaker. Right on 60th anniversary of the famous Fender Stratocaster guitar.

Stratobaffle multi-layer cardboard prototype equipped with the high-end full-range driver Visaton B200.

Stratobaffle multi-layer cardboard prototype equipped with the high-end full-range driver Visaton B200.

The Fender Stratocaster guitar turns 60 this year. Its well-known shape was used to design the Stratobaffle speakers.

The Fender Stratocaster guitar turns 60 this year. Its well-known shape was used to design the Stratobaffle speakers.

Stratobaffle in an open baffle design. No speaker enclosure means that both sides of the driver radiate sound. Not necessarily loud, but very detailed and open sound.

Stratobaffle in an open baffle design. No speaker enclosure means that both sides of the driver radiate sound. Not necessarily loud, but very detailed and open sound.

Let’s celebrate Fender Stratocaster 60th anniversary  together with Stratobaffle speakers.

Let’s celebrate Fender Stratocaster 60th anniversary together with Stratobaffle speakers.

Stratobaffle main parts before assembling.

Stratobaffle main parts before assembling.


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Magic TRIck revision 3 front panel. First beats of Haendel's Messiah creates a display bar for controlling volume and other adjustments.

Magic TRIck revision 3 front panel. First beats of Haendel's Messiah creates a display bar for controlling volume and other adjustments.

Trifield decoder implementation in the Analog Devices’ Sigma Studio software. No special programming skill is necessary, as the decoder is built of predefined blocks and connections among them. Some blocks, however, will have their parameters set up by a microcontroller. http://redelectron.eu/trifield-decoder/

Trifield decoder implementation in the Analog Devices’ Sigma Studio software. No special programming skill is necessary, as the decoder is built of predefined blocks and connections among them. Some blocks, however, will have their parameters set up by a microcontroller. http://redelectron.eu/trifield-decoder/

Magic TRIck will soon change into 3 main channel system for stereo program reproduction. Michael's Gerzon 3x2 Optimal Reproduction Matrix for multispeaker stereo is to be implemented in the Analog Devices ADAU1701 DSP chip. Pretty sophisticated project made fairly easy: http://redelectron.eu/trifield-decoder/

Magic TRIck will soon change into 3 main channel system for stereo program reproduction. Michael's Gerzon 3x2 Optimal Reproduction Matrix for multispeaker stereo is to be implemented in the Analog Devices ADAU1701 DSP chip. Pretty sophisticated project made fairly easy: http://redelectron.eu/trifield-decoder/

Analog Signal Processor boards (the set of active filters and equalization circuits well known from Linkwitz’ projects) driving eight LM3886 power amplifiers. Every loudspeaker in this system is directly driven by its own power amplifier. Tweeters and midwoofers are helped by four subwoofers (multisub system a ’la Geddes style). Such an active multichannel system can sound really well. Not quite magic, but close.

Analog Signal Processor boards (the set of active filters and equalization circuits well known from Linkwitz’ projects) driving eight LM3886 power amplifiers. Every loudspeaker in this system is directly driven by its own power amplifier. Tweeters and midwoofers are helped by four subwoofers (multisub system a ’la Geddes style). Such an active multichannel system can sound really well. Not quite magic, but close.

Nearfield measurement of the Peerless SLS-213 driver in a 24-litre sealed cabinet. This woofer speaker is a part of the Magic TRIck v4 multi-sub configuration.  http://redelectron.eu/multi-sub-trick/

Nearfield measurement of the Peerless SLS-213 driver in a 24-litre sealed cabinet. This woofer speaker is a part of the Magic TRIck v4 multi-sub configuration. http://redelectron.eu/multi-sub-trick/

The crossover frequency between the Peerless 20” midwoofer and Vifa ring radiator built into a waveguide was set to 1 kHz. This was rather a daring idea to set this point in the middle of the critical mid-frequency range, but many well-regarded waveguide designs encouraged me to try such a solution. Indeed it sounded quite well and also measured well. The midwoofer was working in a sealed 22 litre enclosure and was actively equalized to achieve Qtc=0.5 and bottom frequency of 25 Hz (-3 dB).

The crossover frequency between the Peerless 20” midwoofer and Vifa ring radiator built into a waveguide was set to 1 kHz. This was rather a daring idea to set this point in the middle of the critical mid-frequency range, but many well-regarded waveguide designs encouraged me to try such a solution. Indeed it sounded quite well and also measured well. The midwoofer was working in a sealed 22 litre enclosure and was actively equalized to achieve Qtc=0.5 and bottom frequency of 25 Hz (-3 dB).

Setting the proper center channel delay value is crucial for good stereo imaging in the Magic TRIck Trifield system. http://redelectron.eu/center-right/

Setting the proper center channel delay value is crucial for good stereo imaging in the Magic TRIck Trifield system. http://redelectron.eu/center-right/

Main loudspeakers of the Magic TRIck ver. 3. These were controlled directivity speakers with a 20” midwoofer and a ring radiator in a waveguide. They were designed as fairly big bookshelf  loudspeakers and equalized for such a type of operation.

Main loudspeakers of the Magic TRIck ver. 3. These were controlled directivity speakers with a 20” midwoofer and a ring radiator in a waveguide. They were designed as fairly big bookshelf loudspeakers and equalized for such a type of operation.

Vifa XT25TG30 ring radiator and the inner side of its waveguide. Thanks to low resonance frequency of the tweeter and big diameter of the waveguide the driver is capable to radiate effectively from roughly 1 kHz.

Vifa XT25TG30 ring radiator and the inner side of its waveguide. Thanks to low resonance frequency of the tweeter and big diameter of the waveguide the driver is capable to radiate effectively from roughly 1 kHz.

This subwoofer has been used since the very first version of Magic TRIck. There is the Peerless SLS-213 (aka SLS-8) driver in a 9-litre sealed box. Two such subwoofers together with two woofers are to be used in a multi-sub configuration of the 4th edition of the system. http://redelectron.eu/multi-sub-trick/

This subwoofer has been used since the very first version of Magic TRIck. There is the Peerless SLS-213 (aka SLS-8) driver in a 9-litre sealed box. Two such subwoofers together with two woofers are to be used in a multi-sub configuration of the 4th edition of the system. http://redelectron.eu/multi-sub-trick/

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